import urllib
import urllib2

url = 'http://email-portal.appspot.com/reject'
values = {'email' : 'xiaojay@g.cn',
          'sub' : 'Northampton',
          'content' : 'Python\nhello\nworld\n' }

data = urllib.urlencode(values)
req = urllib2.Request(url, data)
response = urllib2.urlopen(req)
the_page = response.read()
print the_page
